STUDY ON DYNAMIC PLASTIC BUCKLING OF SLENDER THIN-WALLED PROJECTILES

摘要

The present paper conducts experimental and numerical studies on the dynamic plastic buckling of slender thin-walled projectiles, such as KE warhead or Earth Penetrating Weapon(EPW). Two failure modes, i.e., local axial crapy inflation and axial evaginable tearing, for different length-diameter-ratio projectiles, are observed in the tests. Different failure modes depend on the geometry of projectile, initial impact conditions and target material. Numerical simulations are conducted to display the failure and damage process of projectiles. It confirms that these failure modes in different scenarios agree well with the experimental phenomena.